Finding the Fourth Proportional to 3,494.49, 5,233.64 and 3,390.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,494.49 : 5,233.64 = 3,390.81 : x
2. Step 2: Convert to fraction form
   3,494.49/5,233.64 = 3,390.81/x
3. Step 3: Cross multiply
   3,494.49x = 5,233.64 × 3,390.81
4. Step 4: Simplify right side
   3,494.49x = 17,746,261.89
5. Step 5: Solve for x
   x = 17,746,261.89/3,494.49
6. Step 6: Final answer
   x = 5,078.36